| Finding of Neoproterozoic （～775 Ma） magmatism recorded in metamorphic complexes from the North Qilian orogen： Evidence from SHRIMP zircon U-Pb dating |
| |
| 作者姓名： | Chien-Yuan Tseng Houng-Yi Yang WAN Yusheng LIU Dunyi Da-Jen Wen Tzung-Chi Lin Kuo-An Tung |
| |
| 作者单位： | [1]Department of Earth Sciences, National Cheng Kung University, Tainan 701, China [2]Beijing SHRIMP Centre, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China [3]Department of Geosciences, National Taiwan University, Taipei 106, China |
| |
| 摘 要： | The Qilian Mountain is considered a part of the Cen- tral Orogenic Belt of China1]. The Central Orogenic Belt of China, extending for a distance of about 4000 km long in the E-W direction from the east coast west- ward through the mainland China all the …
|
| 关 键 词： | 岩浆 造山带 SHRIMP 锆石 年代测定 |
| 收稿时间： | 2005-11-08 |
| 修稿时间： | 2005-11-082006-01-24 |
Finding of Neoproterozoic (～775 Ma) magmatism recorded in metamorphic complexes from the North Qilian orogen: Evidence from SHRIMP zircon U-Pb dating |
| |
| Chien-Yuan Tseng Houng-Yi Yang WAN Yusheng LIU Dunyi Da-Jen Wen Tzung-Chi Lin Kuo-An Tung.Finding of Neoproterozoic (～775 Ma) magmatism recorded in metamorphic complexes from the North Qilian orogen: Evidence from SHRIMP zircon U-Pb dating[J].Chinese Science Bulletin,2006,51(8):963-970. |
| |
| Authors: | Chien-Yuan Tseng Houng-Yi Yang Wan Yusheng Liu Dunyi Da-Jen Wen Tzung-Chi Lin Kuo-An Tung |
| |
| Institution: | (1) Department of Earth Sciences, National Cheng Kung University, Tainan, 701, China;(2) Beijing SHRIMP Centre, Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037, China;(3) Department of Geosciences, National Taiwan University, Taipei, 106, China |
| |
| Abstract: | SHRIMP U-Pb dating was carried out on zircons from the Niuxinshan gneissic granite and the Leigongshan gneissic tonalite in
the North Qilian orogen, NW China. The results yield weighted averaged 206Pb/238U ages of 776±10 Ma and 774±23 Ma respectively. Igneous morphology, oscillatory zonings, and relatively high Th/U ratios for
these zircons suggest magmatic origin. These ages are interpreted as timing of magma emplacement and thus representing a Neoproterozoic
(∼775 Ma) magmatic event in the North Qilian area. It is suggested that this magmatism is probably related to breakup of the
supercontinent Rodinia. This finding, together with the similar ages of 750 to 800 Ma reported for neighboring terranes of
South-central Qilian and North Qaidam, is of significance to understanding of the Rodinia evolution in West China. |
| |
| Keywords: | North Qilian orogen zircon U-Pb age Neoproterozoic magmatism Rodinia breakup |
| 本文献已被 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《中国科学通报(英文版)》浏览原始摘要信息 |
| 点击此处可从《中国科学通报(英文版)》下载免费的PDF全文 |
